Trolley-wheel.



No. 879,593. PATENTED FEB. 18, 1908. J. M. SIBGRIST.

TROLLEY WHEEL.

APIhIGATION FILED SEPT 4 1907 F: s E] 3513 X at oz-um f'ig t m k JACOB M. SIEGRIST, OF OSWEGO, NEW YORK.

TROLLEY-WHEEL.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed September 4- 1907. Serial No. 391.341-

To all whom it may concern:

Be it known that I, JAooB M. SiEGRIsT, a citizen of the United States, and resident of ()swego; in the county of Oswego, in the State of New York, have invented new and useful Improvements in 'Irolley-VVheels, of which the following taken in connection with the accompanying drawings, is a full, clear, and exact description.

Thisinvention relates to the class of trolleys .which are employed on electric cars for conducting the electric current from the trolley-wire to the motor of the car. And the invention consists in an improved construction of the trolley-wheel and its axial su port as hereinafter described.

n the accom anying drawings Figure 1 is a face view of t e trolley-wheel and the bifurcated end or so-called harp of the trolley pole; Fig. 2 is a central longitudinal section of the same; Fig. 3 is a side view of one of the arms ofthe harp; Fig. 4 is a transverse section on the line X-X in Fig. 2 and Fi 5 is a transverse section on the line Y- in Fig. 4.

-a' represents the trolley-wheel, and -'-b the fork or so-called harp on which the said wheel is carried. The axial support of the wheel .a consists of the shaft -c which is inserted cndwise through perforations in the arms of the bar and passes through an axial cylindrica horc d extending through the wheel and considerably lar er in diameter than the shaft as shown in 2 of the drawings. In each end of the bore d is a tubular bushing -ecom osed of brass or other suitable metal and itted tightly and fastened in said bore. Said bushings embrace the shaft c and constitute the journal bearings of the wheel. The said bearings are lubricated from the cylindrical chamber -fformed directly around the central ortion of the shaft by the enlarged cylindrical bore d and terminating at the inner ends of the: bushings e c which form dams across the ends of the chambenas shown in Fig. 2. A channel g---- extends obliquely from the lubricant chamber -f-- to the periphery of thewhecl to hllow the lubricant to be introduced into said chamber. The outer end of the channel is provided with a suitable removable stop per --h--.

To retain the shaft --o' in its position in the harp and prevent it from turning, I form one of the ends of said shaft with a rigidly aflixed head;ji which is formed with a shoulder on its inner side to bear on the outer side of the harp, and is provided in its outer face with a transverse groove y'.

A spring tongue Z: is attached at one of its ends to the adjacent arm of the harp and has its free end passing through the groove y-- and pressing the head -'iinward so as to cause said head to bear on the outer side of the aforesaid arm of the her The head "laffords a convenient ho d on the shaft for withdrawing it from the harp when required for repairing or renewing the trolley-wheel. Said withdrawal of the shaft is readily permitted by throwing the free end of the spring tongue 7c out of the groove and swinging the said tongue aside from the head -i.

l l' denote spring plates which are fastened at one end to the extremities of, the arms of the bar and extend with their free ends between t e inner sides of said arms and ends of the bushings '-e against which latter the spring plates press so as to restrain the bushings from strikin the harp and thus obviate rattling thereof.

My described invention is especially desirable in trolley-wheels which are formed with the spirally grooved cheeks -0-0-- owing to the increased length of the spindle or shaft cre uired for supporting the wheel. The spira grooves are represented at rand serve to restore an accidentally displaced wheel. to its proper position to travel with its central groove '-aon the trolley-wire.

To strengthen the walls of the grooves r I form "said walls with a bulge tas shown.-

What I claim as my invention is:

1. In combination with the harp and shaft, the trolley-wheel formed with a continuous axial bore of uniform diameter throughout the width of the wheel and larger than the diameter of the shaft, bushings secured in the ends of said bore and terminating in dams at the ends of the cylindrical lubricating chamber formed directly around the entire central portion of the 1."

shaft. y

2. in combination with the harp and trolley-wheel, the shaft passing through said parts and formed at one oi its ends wlth u ing the head of the shaft onto the outer side rigid head provided with a. shoulder to hemol' the harp.

on the outer side of tho harp and with :1, i J A0015 M HFCRBT transverse groove in tho outer face of said 1 5 head, and aspring tongue attached at one In prusencdofend to the harp and having its free end puss- J. J. LAAss,

' ing through the aforesaid groovo and press- 5. 1t. LAVlNE. 

